According to the Cowboy Casonova Songfacts, In this song Carrie warns another woman to stay away from this good-time cowboy as he's "candy-coated misery/ He's the devil in disguise /A snake with blue eyes."
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You better take it from me
That boy is like a disease
You're runnin' and tryin' and tryin' to hide
And you're wondering why you can't get free